[johan56]

it would be great if one could login
and continue viewing on other devices
(a bit like a netflix experience...)

for privacy concerns

• the data could be anonymized or
  
• saved on a user owned online location like dropbox, megadrive...
  

[jjd-uk]

You can already do this if you setup a central MySQL database.

[Ned Scott]

syncing and sharing (wiki)